Ok I have a 96 discovery it will start and idle as soon as I give it gas it will studder backfire and die.

Things I have done
new plugs and wires
changed out coil pack
got maf sensor cleaner and cleaned it
cleaned throttle body with carb cleaner
new fuel filter
new air cleaner
got a can of connector cleaner and did connectors on throttle body and maf

I am at my wits end working on this truck that me and my family love to drive and travel with.

Any help would be appreciated and thanks for your time

Happy Holidays

 

You got a buch of miles on that baby?

 

any codes? pending codes? My bet is the TPS

 

Welcome to the World of Discovery Recovery. Come on in, the water is fine........

Do not drink the KoolAid.

 

Any warning lights on? Get any codes?

 

I have no codes but will look at the tps

 

No codes swapped out the tps sensor for another but there was no change on how it runs I have 76000 miles on it

 

A hour before the truck ran great then my wife took it to do her workout and she said it was like you flipped a switch and it would hardly even go

 

1. Fuel pressure test for 32-34 PSI at schrader valve on passenger side fuel rail. You did filter, it could be bad outta da box, or pump could be an issue.

2. Does check engine light come on for a second or two when starting (bulb test), or is burned out? MAF will do this if unplugged - see this from RAVE:

specification vehicles.

Maybe a pin got bent in the electrical plug for MAF? MAF shows up in a code reading scanner, if one available.

Vehicle Speed Switch, but failure of that more commonly noticed while moving.

 

I will check the fuel pressure and the pins on maf plus I do have a obd2 the check engine light does work so will check those 2 things and get back 2 u thanks for the reply.